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I am testing my application and want to observe behavior when I get delay in SCSI disk write on a linux machine (Fedora). I want to control the delay to control the test.

I am exploring FUSE as an option to achieve this, I googled and there seem to be options to introduce faults but couldn't find a solution to introduce delays.

Anyone used something in past to achieve this?

Aditya
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    If the delay isn't really at the SCSI level, but for the block device, with a layer of indirection (device mapper) it should be doable with this: https://www.kernel.org/doc/Documentation/device-mapper/delay.txt (then look for dm-delay on internet there's a lot of information available) – A.B Jun 19 '18 at 17:25
  • looks exactly like what I want. – Aditya Jun 20 '18 at 00:23

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